Thunder Bay – Weather – Thunder Bay is surrounded by weather alerts and advisories. The week starts with old man winter in full control.

Thunder Bay starts Monday in full mid-winter mode: very cold air, gusty northwest winds, and periods of light snow with local blowing snow early.

The good news is the light snow tapers off this morning, and we’ll get a mix of sun and cloud later today. The cold remains the bigger story, with frostbite risk continuing today, tonight, and again Tuesday morning.

Today’s Weather Overview

Current Conditions (Thunder Bay Airport — 7:00 AM EST)

• Temperature: -23.4°C (Weather Focus: -23°C)

• Condition: Mostly cloudy

• Wind: NNW 27 km/h, gusts 44 km/h

• Wind Chill: -36

• Humidity: 61%

• Pressure: 101.8 kPa, rising

• Visibility: 24 km

Cold air + wind is doing the damage this morning. Even with decent visibility at the airport, it feels harsh outside—especially in exposed areas.

Today (Monday, Jan 19)

• Periods of light snow and local blowing snow ending early this morning

• Then a mix of sun and cloud

• Wind NW 30 km/h gusting to 50

• Temperature steady near -21°C

• Wind chill near -33

• Risk of frostbite

Extended Weather Forecast

Expected Conditions (Next Three Days)

Tonight

• A few clouds

• Wind NW 20 km/h gusting to 40, becoming light late evening

• Low: -23°C

• Wind chill near -31

• Risk of frostbite

Tuesday, Jan 20

• A mix of sun and cloud

• Wind becomes W 20 km/h gusting to 40 in the morning, then light late afternoon

• High: -16°C

• Wind chill -32 in the morning, -23 in the afternoon

• Risk of frostbite

• UV index: 1 (low)

Wednesday, Jan 21

• Periods of snow

• High: -13°C

• Night: Cloudy periods with 40% chance of flurries, low -23°C

Wardrobe Recommendations

• This morning: Dress for wind chill near -36—heavy parka, insulated mitts, toque, and a scarf/neck warmer (face coverage helps a lot).

• Today’s wind: A windproof outer layer is key with gusts up to 50 km/h.

• Footwear: Warm boots with good tread; blowing snow can hide slick patches on sidewalks and parking lots.

• Tonight & Tuesday morning: Keep exposed skin covered—frostbite risk rises fast in the -30 wind chill range.

Weather Trivia

Thunder Bay’s cold often feels sharper when northwest winds kick in. Those winds funnel colder air across the region and can also create local blowing snow, even when snowfall amounts are light—especially on open roads and higher terrain.

Weather Overview

Thunder Bay weather forecast for January 19, 2026: Very cold with wind chills near -36 this morning. Light snow and local blowing snow end early, then a mix of sun and cloud. Gusty northwest winds continue with frostbite risk through tonight. Tuesday stays cold but brighter with a high near -16°C.